966021d00a
Remove E0773 "A builtin-macro was defined more than once."
Error E0773 "A builtin-macro was defined more than once" is triggered when using the same `#[rustc_builtin_macro(..)]` twice. However, it can only be triggered in unstable code (using a `rustc_` attribute), and there doesn't seem to be any harm in using the same implementation from `compiler/rustc_builtin_macros/…` for multiple macro definitions.
By changing the Box to an Arc in `SyntaxExtensionKind`, we can throw away the `BuiltinMacroState::{NotYetSeen, AlreadySeen}` logic, simplifying things.
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| tests | ||
| .clang-format | ||
| .editorconfig | ||
| .git-blame-ignore-revs | ||
| .gitattributes | ||
| .gitignore | ||
| .gitmodules | ||
| .ignore | ||
| .mailmap | ||
| bootstrap.example.toml | ||
| Cargo.lock | ||
| Cargo.toml | ||
| CODE_OF_CONDUCT.md | ||
| configure | ||
| CONTRIBUTING.md | ||
| COPYRIGHT | ||
| INSTALL.md | ||
| LICENSE-APACHE | ||
| license-metadata.json | ||
| LICENSE-MIT | ||
| README.md | ||
| RELEASES.md | ||
| REUSE.toml | ||
| rust-bors.toml | ||
| rustfmt.toml | ||
| triagebot.toml | ||
| x | ||
| x.ps1 | ||
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